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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2017, Vol. 38 ›› Issue (3): 320363-320363.doi: 10.7527/S1000-6893.2016.0254

• Electronics and Electrical Engineering and Control • Previous Articles     Next Articles

Trajectory planning of parafoil system with intricate constraints based on Gauss pseudo-spectral method

LUO Shuzhen1, SUN Qinglin1, TAN Panlong1, TAO Jin1, HE Yingping2, LUO Haowen3   

  1. 1. College of Computer and Control Engineering, Nankai University, Tianjin 300380, China;
    2. Aerospace Life-Support Industries Ltd, Aviation Industry Corporation of China, Xiangyang 441003, China;
    3. College of Agricultural Engineering, Henan University of Science and Technology, Luoyang 471003, China
  • Received:2016-04-23 Revised:2016-09-07 Online:2017-03-15 Published:2017-04-11
  • Supported by:

    National Natural Science Foundation of China (61273138, 61573197); National Key Technology Research and Development Program of China (2015BAK06B04); Key Technology Research and Development Program of Tianjin (14ZCZDSF00022); The Key Foundation of Tianjin (14JC2DJC39300)

Abstract:

The parafoil system is commonly affected by complex interferences, such as wind field and terrain environment, leading to imprecise homing and increasing control difficulty. A trajectory optimization of the parafoil system subjected to intricate constraints is proposed to realize accurate landing, flare landing against the wind, and global optimal control. A model for the parafoil system in the wind field is built. To transform the problem of trajectory optimization of the parafoil system in complex environment to the problem of optimal control with a set of nonlinear and intricate constraints, the complex terrain environment is converted into real-time path constraint by introducing into terminal constraints the terrain environment surface, the landing deviation and flare landing, and the objective function with minimum control consumption is defined. Gauss pseudo-spectral method is applied to transform the problem of optimal control with intricate constraints to the problem of easily solvable non-linear programming. Numerical simulation and experimental results show that the proposed method can efficiently plan out an optimal trajectory with high precision to meet the constraints in a variety of complex environments. A comparison with the existing method of chaotic particle swarm optimization demonstrates the outstanding performance of the proposed method.

Key words: parafoil system, intricate constraints, Gauss pseudo-spectral method, optimal control, trajectory planning

CLC Number: